I'm a newbie. I need help designing a circuit to run an underwater rov. I want the thrusters to run on 12vdc(thats as far as ive gotten to the motor parts). I want to reverse these thrusters without having to use two batteries and reversing the wires. How can I do this? I really need a schematic. I've never done this before. everything ive ever done used relays. I want to try ic circuitry now.